Description: In the article, suggests an algorithm for increasing noise immunity of control and communication systems based on the synthesis of signal-code structures by improved correlation properties. It is shown that an increase in noise immunity of control and communication systems is possible about the joint use of non-decodo-coding codes and orthogonal discrete-frequency signals. Formation conditions for the synthesis of signal-code structures with specified correlation properties. The choice of the obstacle-dosage code is justified. The necessary conditions for the dimension of the code and its minimum code distance are formulated and proved. It is shown that the periodic correlation functions of the sequences formed by the code words of equidistant codes have a two-level structure, and the generated signal assemblies have improved autocorrelation properties.
Keywords: сross-correlation function, correlation properties, normalized correlation function